Flexible CNT-MXene-CNT Film with Low Surface Conductance for High- and Low-Power Electromagnetic Absorption Protection

High absorption performance terahertz (THz) and GHz absorbers with low surface conductance are urgently indispensable in the application of military electromagnetic protection and multiband communication. Herein, cost-effective approaches of modified grafting and hot-pressing molding methods are proposed to construct CNT-MXene-CNT films based on a modified methyl vinyl silicone rubber (MVSR). The resultant 3 mm CNT-1.1-MXene-1.9-CNT-1.1 sample exhibits average electromagnetic interference shielding effectiveness (EMI SE) of about 29.2 dB in the range of 2–12.5 GHz and favorable EMI SE of 48.2 dB within 0.1–2.2 THz. In addition, the optimized sample also obtains excellent EMI SE of about 31.8 and 41.2 dB under the high-power test conditions in the GHz and THz bands. Besides, the CNT-1.1-MXene-1.9-CNT-1.1 sample possesses only about 1.5% overall loading content with a low surface conductivity of 2.3 μS/m. The as-prepared absorber with a low surface conductance demonstrates enormous potential in future military and civilian applications

A Tri-Layer Structural Film Containing Nickel Nanocoating for Electromagnetic Transmittance and Joule Heating

In the realm of military applications, the effective management of ice accumulation on strategic equipment without compromising the integrity of the electromagnetic signal transmission is a perennial challenge. To confront this issue, a revolutionary trilayered material composite known as MPE (metal-polyimide-electric heating layer) has been developed, demonstrating a sophisticated balance between deicing functionality and electromagnetic transparency. The MPE composite is ingeniously architected in a trilayer configuration, comprising a frequency-selective wave-transmissive stratum, an interjacent insulating dielectric interlayer, and an electric heating layer. The former is the result of a pioneering surface grafting modality of keratin, subsequently metallized with a nickel (Ni) coat via a chemical plating technique, which concurrently imparts the composite with a temperature-sensitivity range between −10 and 80 °C. The latter is formulated from a cyanate ester (CE) resin with organic conductive fillers, endowing the material with a high thermal threshold of up to 220 °C. Experimental evaluations of the MPE material have yielded a remarkable 88% transmissivity at the designated resonant frequency, a significant improvement over traditional graphene heating layer. This high level of performance, combined with the material’s inherent deicing properties and the capacity for remote control via integrated sensing technology, positions the MPE as a substantial breakthrough for military operations

PC-3 cell proliferation curves at different seeding densities.

In order to determine the optimal innoculation density of PC-3 cells, we adopted five cell seeding densities such as 6*105, 4*105, 2*105, 1*105, and 0.5*105 cell/ml.</p

Factors and their corresponding concentrations by Plakett-Burman design.

Factors and their corresponding concentrations by Plakett-Burman design.</p

ANOVA for central composite design of response surface methodology.

<p>ANOVA for central composite design of response surface methodology.</p

Basal medium screening.

<p>Four basic media were screened: DMDM (5ûS), DMEM/F12 (5ûS), F12 (5ûS), RPMI1640 (5ûS).</p

Residual diagnostic plots of the quadratic model.

<p>(A) The normal distribution of residuals. (B) Residuals analysis of the experiment. (C) Comparison between the experimental values and the predicted.</p

Plackett-Burman matrix of the experimental design.

<p>Plackett-Burman matrix of the experimental design.</p

Experimental design and results by central composite design.

<p>Experimental design and results by central composite design.</p

Response surface plot of the regression equation (EGF, FGF).

<p>The three-dimensional response surface plots (A) and contour charts (B) were used to illustrate the individual and interactive effects of EGF and FGF.</p